diff options
Diffstat (limited to 'nuttx/lib/math/lib_cosh.c')
-rw-r--r-- | nuttx/lib/math/lib_cosh.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/nuttx/lib/math/lib_cosh.c b/nuttx/lib/math/lib_cosh.c new file mode 100644 index 000000000..106990311 --- /dev/null +++ b/nuttx/lib/math/lib_cosh.c @@ -0,0 +1,33 @@ +/* + * Copyright (C) 2009, 2010 Nick Johnson <nickbjohnson4224 at gmail.com> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <apps/math.h> +#include <float.h> + +float coshf(float x) { + x = expf(x); + return ((x + (1.0 / x)) / 2.0); +} + +double cosh(double x) { + x = exp(x); + return ((x + (1.0 / x)) / 2.0); +} + +long double coshl(long double x) { + x = expl(x); + return ((x + (1.0 / x)) / 2.0); +} |